Re: [DNSOP] Working Group Last Call for draft-ietf-dnsop-svcb-https

Ben Schwartz <bemasc@google.com> Fri, 19 March 2021 20:58 UTC

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From: Ben Schwartz <bemasc@google.com>
Date: Fri, 19 Mar 2021 16:57:58 -0400
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To: Pieter Lexis <pieter.lexis@powerdns.com>
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Subject: Re: [DNSOP] Working Group Last Call for draft-ietf-dnsop-svcb-https
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On Fri, Mar 19, 2021 at 6:13 AM Pieter Lexis <pieter.lexis@powerdns.com>
wrote:

> Or is mandatory a hint to the end-client that it MUST understand the
> keys mentioned in order to use the RR?


Exactly.

If that is the case, a few words
> to that effect would be good.
>

Section 7 says:

   In a ServiceMode RR, a SvcParamKey is considered "mandatory" if the
>    RR will not function correctly for clients that ignore this
>    SvcParamKey.

...

>    A ServiceMode RR is considered "compatible" with a client if the
>    client recognizes all the mandatory keys, and their values indicate
>    that successful connection establishment is possible.  If the SVCB
>    RRSet contains no compatible RRs, the client will generally act as if
>    the RRSet is empty.


Can you suggest a clarification?